Nutrient samples were collected from thirteen river stations and eight bay stations on May 12-13th. All bay stations were sampled at the surface, and Edgewood Shoal was sampled at the surface and bottom. In the five days prior to sampling, 0.57 inches of precipitation were recorded at T.F. Green.
Among the river stations sampled, the highest total nitrogen (TN), and dissolved inorganic nitrogen (DIN) were observed Ten Mile River at Central Ave. (TN = 1,510 ppb, DIN = 1,041.1 ppb). The highest total dissolved nitrogen (TDN) was observed at Moshassuck River @ Footbridge at Mill St. (1,610 ppb). However, a significantly higher TDN compared to the TN observed at this site may indicate an issue with the sampling or analysis. The lowest TN, and TDN were observed at Moshassuck River @ Higginson Ave (TN = 470 ppb, TDN = 329 ppb). The lowest DIN was observed at Coles River @ Milford Rd. (45.4 ppb).
Among the bay stations sampled, the highest surface TN and TDN were observed at Phillipsdale Landing (TN = 1,110 ppb, TDN = 1,080 ppb). The highest surface DIN was observed at Pawtuxet Cove (598.2 ppb). The lowest surface TN was observed at Edgewood Shoal (507 ppb). The lowest TDN was observed at Conimicut Point (<100.0 ppb). The lowest surface DIN was observed at Edgewood Yacht Club and Edgewood Shoal (13 ppb, reflecting minimum detection limits for DIN).
The next scheduled sampling date is May 27th, 2026.